chlorine disinfection Applications

The purpose of de-chlorination is the removal of free chlorine and combined chlorine compounds from potable water, as supplied by municipal water supplies. Chlorine will oxidize the surface of thin film composite polyamide membranes, causing the membrane to lose its ability to repel or reject salts. As a result, the membranes used in Reverse Osmosis (RO) or Electro-deionisation (EDI) systems will exhibit shorter lifetimes when exposed to chlorine in the water they are treating and membrane manufacturers will usually specify an upper limit to ensure a suitable life of the membrane. As a result, it is usual to use a method of dechlorination upstream of the RO or EDI system.

Water is often used as a product, or as part of the manufacturing process. In many industrial applications, processes are chemical (chlorine) intolerant, and UV is widely adopted. atg UV Technology engineers will be pleased to discuss solving disinfection problems with you. As well as a powerful disinfectant, UV is used to remove chlorine, chloramines, ozone, bromine, and a wide variety of contaminants from industrial process water. Within micro-electronics facilities for example, UV is used to remove Total Organic Carbon (TOC) from ultra pure rinse water.

Waterborne illness from microbial growth in water distribution systems is a real threat to water safety. MIOX’s patented Mixed Oxidant Solution (MOS) chemistry for secondary disinfection can help eradicate biofilm that can harbor Legionella and other microorganisms without the use of Chlorine Dioxide. MIOX generators improve workplace safety by eliminating the handling and storage of hazardous chemicals while maintaining steady disinfection residuals.

Our method is the use of Ozone generation. Ozone is a strong oxidizer that is up to 3000 times for effective than Chlorine. Ozone is not stored, Ozone is generated on site. With this method, this offers the homeowner a means of disinfection that is completely hands free. Ozone is very safe for the environment, with the only bi-product being Oxygen. Ozone is generated by bonding 3 atoms of Oxygen to form Ozone. Once the Ozone comes in contact with a virus or bacteria, the Ozone attacks the nucleus of the cell and destroys the bacteria or virus. Ozone will make this kill up to 3000 times faster than Chlorine. Once, the Ozone attacks the bacteria it reverts back to Oxygen. Ozone is not stored, Ozone has to generated on site.

As water features, wave machines, flumes and splash pads raise the fun factor in swimming pools, traditional methods of disinfecting water, using chlorine, are causing problems for operators and customers alike. Higher water temperatures and increased turbulence in leisure pools requires increased dosages of chlorine, leading to pool users complaining of burning eyes, red or itchy skin and an over powering chlorine smell throughout the facility. In some extreme cases the fabric of the building has also been attacked through corrosive condensation.

Chlorine dioxide is an effective tool for the treatment of potable water. It is a powerful disinfectant that nicely balances purification performance against disinfection by product formation. It is one of four EPA approved disinfectants for drinking water with CT values second only to ozone in biocidal efficacy but without the ozonation by-products or high capital expense.

Problem: Prior to environmental discharge, wastewater is disinfected to ensure pathogens present in the water are inactivated. Ultraviolet (UV) disinfection is becoming a widely accepted treatment technology for wastewater disinfection due to the deleterious effects of chlorine on aquatic life. The ability for the UV light to penetrate the water is directly related to the concentration of suspended particles and organic matter in water that absorb or scatter the light.

Ultraviolet disinfection is now an established method of water treatment for Swimming Pools, Spas, Hydro Pools, Splash Pads and Water Features, and has become the preferred treatment choice for a number of leading international leisure brands. atg UV`s range of treatment systems are proven to improve the swimming pool environment by improving water quality, air quality and safety, leading to increased customer satisfaction. UV systems not only provide disinfection against the 17 known chlorine resistant micro-organisms, such as Cryptosporidium and Giardia, which have a thick outer membrane making them highly resistant to traditional Chlorine disinfection, UV also destroys chloramines. Chloramines are formed when free chlorine reacts with organics, such as sweat, body fats and urine, brought into the pool environment by bathers.

With atg UV systems treating in excess of 2500 m3/hr daily, Ultraviolet disinfection is no longer an ‘emerging` technology. A number of Water Treatment Works across the world are now investing heavily in Ultraviolet technology as the threat of chlorine resistant parasites, such as Cryptosporidium and Giardia, continue to pose a serious risk to water companies and their customers. To this end, in the UK, the DWI have issued their guidelines for UV operation and system selection to the UK water industry. A key feature of their guidance is UV system validation. Validation refers to a series of 3rd party testing to ensure the performance of an Ultraviolet system design under a range of operating environments.

Better Water Quality – without the undesired side-effects
Characteristic of swimming pools, saunas and spa facilities in the past the were the “chlorine smell” and “red eyes”. They are caused by the disinfectant solution chlorine, which is added to the water in the swimming pools.
Even here the REDO method is an alternative that can be applied – REDOpool guarantees a better effect to treating the water, in comparison to the traditional methods and at the same time reduces the unwanted side-effects for the swimmers.

As one of the world`s most precious natural resources, the reuse of water is becoming increasingly important. MIOX is both the most cost-effective solution and the preferred technology for disinfection and oxidation of wastewater for reuse or reintroduction into the environment. MIOX`s hypochlorite generators offer a safer, technologically superior solution to wastewater treatment, virtually eliminating many of the negative problems associated with traditional chlorine disinfection. Safer, economical and significantly more effective, MIOX is revolutionizing the process of making water safe again.

atg UV Technology are the market leader for UV systems designed to treat potable drinking water for offshore crew water supplies. UV is now the disinfection technology of choice, providing a simple chemical free solution to protect against all known bacteria and harmful microorganisms, including chlorine resistant microorganisms such as Cryptosporidium and Giardia. Available as skid mounted, duty / standby solutions, atg UV Technology’s offshore UV drinking water packages are included as part of the on board water maker, typically installed following desalination by an RO package or Flash Evaporator.

The luxurious pool experience: Say goodbye to chlorine odors, irritated eyes, hair damage and faded swimsuits caused by excessive disinfection by-products and over chlorination. Common salt and electricity generate a consistent and proper amount of pure chlorine solution in a safe, simple and cost effective way to disinfect pools. We are committed to improving your recreational water quality, while using a green, recyclable treatment process.

Chlorine dioxide is a well-known disinfectant for drinking water with many advantages over chlorination. Today there are estimated to be over 900 public water systems using chlorine dioxide for water disinfection world-wide. Also in Australia it is approved for a wide range of uses. However, the acceptance of chlorine dioxide in Australia as a disinfecting agent for drinking water has been hampered by the crude methods available for generating chlorine dioxide – methods that require relatively complex equipment and/or produce impure chlorine dioxide with many undesirable impurities.

Modern disinfection procedures improve swimming enjoyment. Our UV and ozone systems make swimming pool water hygienically pure. In addition to conventional disinfection with chlorine, unpleasant smells are also avoided, for example.

Ozone is a very effective alternative to chlorine and other chemicals as a disinfection agent in swimming pools. Ozone can safely prevent the formation of chlorine byproducts, such as chloramines and trihalomethanes which are potentially carcinogenic.

Problem: Organic matter (UV254/TOC) in drinking water can react with chlorine to form harmful disinfection by-products (DBPs). Some removal of TOC is achieved through the conventional drinking water treatment processes, while carbon absorption may be used to further enhance the removal of TOC prior to chlorine disinfection.

Chlorine reacts with compounds in the swimming pool water to give rise to by-products. Although there is potentially a large number of chlorine-derived disinfection by-products (DBPs), the substances produced in the greatest quantities are chloramines. Chlorine reacts extremely rapidly with ammonia in the water to form chloramines (monochloramine, dichloramine and trichloramine).

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you

Subscribe to our eBulletins

Join our growing community of environmental professionals who are currently subscribed to weekly newsletters, product alerts, job alerts, and our monthly event updates and article newsletters. Stay up-to-date with the global environmental industry. Sign up for one or all of our free newsletters and alerts today.